QTableWidget使用自定义代理

本文主要是介绍QTableWidget使用自定义代理，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

QTableWidget表格使用自定义代理，以QLineEdit为例

继承QItemDelegate类
主要重写四个方法
createEditor()
setEditorData()
setModelData()
updateEditorGeometry()

#include <QItemDelegate>
#include <QLineEdit>
class TableItemEditDelegate :  public  QItemDelegate
{Q_OBJECT
public :TableItemEditDelegate(QObject *parent = nullptr) : QItemDelegate(parent){}QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const{Q_UNUSED(option);Q_UNUSED(index);QLineEdit *editor = new QLineEdit(parent);editor->setValidator(new QRegExpValidator(QRegExp("^[0-9]{1,6}$")));return editor;}void setEditorData(QWidget *editor, const QModelIndex &index) const{QLineEdit *control = dynamic_cast<QLineEdit*>(editor);control->setText(index.model()->data(index, Qt::EditRole).toString());}void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const{QLineEdit *control = dynamic_cast<QLineEdit*>(editor);model->setData(index, control->text(), Qt::EditRole);}void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const{Q_UNUSED(index);editor->setGeometry(option.rect);}
};

调用

TableItemEditDelegate *comboBoxDelegate = new TableItemEditDelegate;
this->ui->tableWidget->setItemDelegateForColumn(1, comboBoxDelegate);

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